但是在它的初始阶段，就是宇宙大爆炸后仅一微妙，宇宙是如此之热，致使夸克和胶子那时的存在是自由的和不受约束的。
But in its infancy, just microseconds after the Big Bang, the universe was so hot and dense these quarks and gluons existed freely and unbound.
聚乙烯薄膜作为约束物，对可燃气云爆炸有着重要的影响。
Polythene film used as confinement plays an important role in flammable cloud explosion.
利用高速摄像技术，研究了小药量无约束空间纯铝粉、FAE固体燃料的一次引爆爆炸分散实验过程。
The process of the explosion dispersion FAE charge and of aluminum powder is investigated through high speed video-photography.
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